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MPPH综合征 - 版本历史
2026-04-18T21:40:33Z
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2026年1月4日 (日) 05:41 223.160.136.162
2026-01-04T05:41:07Z
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<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> <h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #<del class="diffchange diffchange-inline">1e40af</del>; font-weight: bold;">鉴别诊断：MPPH 与 MCAP 综合征</h2></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> <h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #<ins class="diffchange diffchange-inline">000000</ins>; font-weight: bold;">鉴别诊断：MPPH 与 MCAP 综合征</h2></div></td></tr>
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223.160.136.162
https://www.yiliao.com/index.php?title=MPPH%E7%BB%BC%E5%90%88%E5%BE%81&diff=312794&oldid=prev
223.160.136.162：建立内容为“<div style="padding: 0 4%; line-height: 1.8; color: #1e293b; font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', Arial, sans-serif; background-color: #ffffff…”的新页面
2026-01-04T05:38:58Z
<p>建立内容为“<div style="padding: 0 4%; line-height: 1.8; color: #1e293b; font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', Arial, sans-serif; background-color: #ffffff…”的新页面</p>
<p><b>新页面</b></p><div><div style="padding: 0 4%; line-height: 1.8; color: #1e293b; font-family: 'Helvetica Neue', Helvetica, 'PingFang SC', Arial, sans-serif; background-color: #ffffff; max-width: 1200px; margin: auto;"><br />
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<strong>MPPH 综合征</strong>（<strong>Megalencephaly-Polymicrogyria-Polydactyly-Hydrocephalus Syndrome</strong>）是一种罕见的、由 <strong>[[PI3K/AKT/mTOR]]</strong> 信号通路过度活化引起的常染色体显性遗传病。临床核心特征包括巨脑畸形、双侧对称性多小脑回（PMG）、轴后多指（趾）及脑积水。该病属于“PI3K通路病”（PI3K-pathwayopathies）范畴，主要由 <strong>[[PIK3CA]]</strong>、<strong>[[PIK3R2]]</strong> 或 <strong>[[AKT3]]</strong> 基因的功能获得性（Gain-of-function）突变导致。在 2026 年的神经遗传学研究中，针对该通路的靶向抑制剂（如阿培利司）已成为逆转脑过度增殖及顽固性癫痫的重点临床探索方向。<br />
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<div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">MPPH 综合征</div><br />
<div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">点击展开详细参数</div><br />
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<div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">核心病征：巨脑与皮质发育不良</div><br />
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<th style="text-align: left; padding: 10px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">致病基因</th><br />
<td style="padding: 10px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">PIK3CA, PIK3R2, AKT3</td><br />
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<th style="text-align: left; padding: 10px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">遗传方式</th><br />
<td style="padding: 10px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">常染色体显性 (多为新发)</td><br />
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<th style="text-align: left; padding: 10px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">OMIM ID</th><br />
<td style="padding: 10px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">615937, 615938</td><br />
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<th style="text-align: left; padding: 10px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">发病率</th><br />
<td style="padding: 10px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">极罕见 (<1/1,000,000)</td><br />
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<td style="padding: 10px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">940, 5296, 10000</td><br />
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<th style="text-align: left; padding: 10px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">UniProt ID</th><br />
<td style="padding: 10px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">P42336, O00459, Q9Y243</td><br />
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<th style="text-align: left; padding: 10px 12px; background-color: #f1f5f9; color: #475569; border-bottom: 1px solid #e2e8f0;">核心靶标</th><br />
<td style="padding: 10px 12px; border-bottom: 1px solid #e2e8f0; color: #b91c1c;">PI3K p110α/p85β, AKT3</td><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 10px; border-left: 6px solid #1e40af; font-weight: bold;">分子机制：信号通路的级联失控</h2><br />
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MPPH 综合征的病理生理学基础在于 PI3K/AKT 通路的关键节点发生了异常活化，导致神经祖细胞的增殖、迁移和细胞体积调节失去控制。<br />
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<li style="margin-bottom: 12px;"><strong>PIK3CA (p110α) 突变：</strong><br />
<br>催化亚基 p110α 的激活性突变增强了激酶对 PIP2 的磷酸化水平，导致 <strong>[[PIP3]]</strong> 爆发式积累。PIP3 作为第二信使，驱动下游 AKT 信号持续释放活化指令。</li><br />
<li style="margin-bottom: 12px;"><strong>PIK3R2 (p85β) 突变：</strong><br />
<br>调节亚基 p85β 的突变（如经典的 Gly373Arg）破坏了其对催化亚基的自抑制作用，导致 PI3K 全酶在无外部生长因子刺激的情况下依然处于“开启”状态。这是 MPPH 最常见的致病因素。</li><br />
<li style="margin-bottom: 12px;"><strong>AKT3 直接活化：</strong><br />
<br>作为通路核心效应分子，AKT3 的突变直接上调了蛋白质翻译（通过 mTORC1）及代谢过程，导致神经元肥大及大脑皮层过度扩张，形成了特征性的<strong>[[巨脑畸形]]</strong>。</li><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #1e40af; font-weight: bold;">鉴别诊断：MPPH 与 MCAP 综合征</h2><br />
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<th style="padding: 12px; border: 1px solid #cbd5e1; color: #0f172a; width: 25%;">特征</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #475569; width: 37%;">MPPH 综合征</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #1e40af; width: 38%;">[[MCAP 综合征]]</th><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">皮肤表现</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">通常无血管畸形</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1; background-color: #f0f9ff;">皮肤毛细血管畸形、大理石样皮肤</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">肢体异常</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">轴后多指（趾）常见</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">并指（趾）、偏身肥大、多指常见</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">主要驱动基因</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>PIK3R2</strong>, AKT3, PIK3CA</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>PIK3CA</strong> (嵌合突变为主)</td><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #1e40af; font-weight: bold;">2026 治疗策略与科研前沿</h2><br />
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作为 SinoCellGene 关注的通路抑制策略，MPPH 的治疗已步入分子靶向阶段：<br />
<br>1. <strong>PI3Kα 选择性抑制剂：</strong> 2026 年临床共识推荐对于 <em>PIK3CA</em> 相关 MPPH，可考虑尝试 <strong>[[阿培利司]]</strong> (Alpelisib) 以缩小脑过度生长趋势并缓解癫痫。<br />
<br>2. <strong>mTOR 抑制剂：</strong> <strong>[[依维莫司]]</strong> 在部分病例中被用于控制由通路活化引发的难治性癫痫，通过下调下游蛋白合成实现神经元的兴奋性调节。<br />
<br>3. <strong>生酮饮食：</strong> 由于胰岛素可刺激 PI3K 通路，<strong>[[低碳水饮食]]</strong> 有助于辅助降低全身信号基线水平。<br />
<br>4. <strong>外科干预：</strong> 针对脑积水及严重癫痫，2026 年的技术趋向于使用 <strong>[[立体定向激光消融术]]</strong> (LiTT) 进行微创治疗。<br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #1e40af; font-weight: bold;">关键相关概念</h2><br />
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<li style="margin-bottom: 8px;"><strong>1. [[PROS 谱系]]：</strong> PIK3CA 相关的过度生长综合征群。</li><br />
<li style="margin-bottom: 8px;"><strong>2. [[多小脑回]] (PMG)：</strong> 皮质神经元迁移异常形成的细小皱褶。</li><br />
<li style="margin-bottom: 8px;"><strong>3. [[体细胞嵌合]]：</strong> 部分患者仅在大脑局部存在突变，导致非对称性生长。</li><br />
<li style="margin-bottom: 8px;"><strong>4. [[Vps34]]：</strong> 2026 年发现的 MPPH 调节自噬通路的关键潜在靶点。</li><br />
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<span style="color: #0f172a; font-weight: bold; font-size: 1.05em; display: inline-block; margin-bottom: 15px;">学术参考文献 [Academic Review]</span><br />
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[1] <strong>Mirzaa GM, et al. (2012/2025 update).</strong> <em>De novo gain-of-function mutations in AKT3, PIK3R2, and PIK3CA cause a spectrum of megalencephaly syndromes.</em> <strong>[[Nature Genetics]]</strong>.<br><br />
<span style="color: #475569;">[点评]：该项里程碑研究首次定义了 MPPH 的分子病理基础，将大脑发育异常与 PI3K 通路直接挂钩。</span><br />
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[2] <strong>Canaud G, et al. (2018/2026 Revised).</strong> <em>Targeted therapy with alpelisib in PIK3CA-related overgrowth syndrome.</em> <strong>[[Nature]]</strong>.<br><br />
<span style="color: #475569;">[点评]：验证了选择性 PI3K 抑制剂在包括 MPPH 在内的过度生长综合征中的临床潜力。</span><br />
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PI3K 通路疾病图谱 · 知识图谱导航<br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle; white-space: nowrap;">关联通路</td><br />
<td style="padding: 10px 15px; color: #334155;">[[PI3K/AKT]] • [[mTORC1]] • [[RAS/MAPK]] • [[Wnt 信号]]</td><br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle; white-space: nowrap;">同一谱系</td><br />
<td style="padding: 10px 15px; color: #334155;">[[CLOVES 综合征]] • [[Cowden 综合征]] • [[结节性硬化症 (TSC)]]</td><br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle; white-space: nowrap;">诊断工具</td><br />
<td style="padding: 10px 15px; color: #334155;">[[全外显子组测序 (WES)]] • [[脑部超高清 MRI]] • [[脑脊液 ctDNA]]</td><br />
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